Office Chair Floating Chassis
The 'floating chassis' of an office chair is a special chassis design that achieves waist fitting and stable seat cushioning during reclining through mechanical linkage and elastic support, commonly found in high-end products.
Hovering and Linkage Functionality
The core of the floating chassis is the 'four-bar linkage support structure'. For example, the 'space chassis' used in the Sihoo C500 II employs mechanical linkage to synchronize the tilt of the seat cushion and backrest, maintaining consistent angle changes. This design addresses the issue of waist suspension in traditional chassis during reclining. When users recline to 140ยฐ-150ยฐ, their waists can still fit snugly against the chair surface, and there is no 'back-slamming' sensation when getting up, making it particularly suitable for scenarios requiring frequent reclining breaks.
Spring Material and Dynamic Support
Floating chassis often use carbon-glass composite springs or fiberglass springs, with their elasticity changing linearly: low resistance in the first half of reclining for easy leaning back, and gradually increasing resistance in the second half to accommodate users of different weights. For instance, the Sihoo C500 II, combined with a domino three-dimensional lumbar support system, achieves 'dynamic waist tracking'โprecisely supporting the lumbar area when sitting upright and following the body's movement during reclining. However, heavier users may feel insufficient support due to the softer middle part of the lumbar support.
Hovering Stability and Operational Experience
High-quality floating chassis must meet the characteristics of 'smooth reclining, stable stopping, and non-aggressive rebound'. Taking the Sihoo C500 II as an example, it supports a large reclining angle of 150ยฐ and can hover, with no play after locking to prevent body shaking. Operational details such as wire-controlled levers and damping adjustments also affect the user experience, requiring smooth regulation that conforms to ergonomics.
Material and Structural Differences
High-end floating chassis (such as the C500 II) use aviation aluminum alloy frames, with more robust backrests and armrest connectors for enhanced durability. Mid-range products (such as the C300 Pro II) may use nylon backrests, which are more cost-effective but slightly less durable. When selecting, consider your budget and usage scenario.
Purchase Recommendations:
- For frequent reclining breaks or heavier users, prioritize carbon-glass composite spring chassis (such as the Sihoo C500 II);
- For those who primarily sit upright and have a limited budget, consider gravity-sensing chassis (such as the JD.COM Jingzao Z9Ultra II priced around a thousand yuan);
- When testing, focus on whether the lumbar support shifts during reclining, whether the seat cushion pushes against the legs, and whether the operation is smooth.
